I've used #2520 and liked it in the .338MarlinExpress, but LVR is better. It was "ok" but unremarkable in my .223's.
In the .223, I've used just about everything to come along in the last 25yrs.
I still haven't found any thing better than BLC2.
High velocity and superlative accuracy. I even prefer it over H335 which is #3 on my list for the .223. My #2 is Reloader15.
However, due to pressure limitations, the #2520 is better than either BLC2 or RL15 in the .338MarlinExpress for higher velocities. But, BLC2 and RL15 are still more accurate.
For the very least expesive loading of the .308 or .223, Wideners has WC844 in stock. It is essentially mil-spec H335. At about $75 plus hazmat for 8lbs, you won't find a better deal.
btw: H335, BLC2 and WC844 are all "sperical" or "ball" powders just like #2520. I also like Acc.#2460 in the .223. Velocities are lower than BLC2, but whereas I'm using 27.0gr of BLC2, you'll only use 25.0gr of #2460, H335, or WC844.